diff --git a/scripts/ver_linux b/scripts/ver_linux
index 810e608..85005d6 100755
--- a/scripts/ver_linux
+++ b/scripts/ver_linux
@@ -32,6 +32,8 @@
 	printversion("PPP", version("pppd --version"))
 	printversion("Isdn4k-utils", version("isdnctrl"))
 	printversion("Nfs-utils", version("showmount --version"))
+	printversion("Bison", version("bison --version"))
+	printversion("Flex", version("flex --version"))
 
 	while (getline <"/proc/self/maps" > 0) {
 		if (/libc.*\.so$/) {